Application of Shape Memory Polymer to Dental Materials : Part 1 Physical Properties

DOI
  • KIMURA Hiroshi
    Department of Dental Technology, Osaka University Faculty of Dentistry
  • TERAOKA Fumio
    Department of Dental Technology, Osaka University Faculty of Dentistry

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  • 形状記憶ポリマーの歯科材料への応用 : 第1報 物性について

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Abstract

Physical properties of polynorbornene and polynorbornene heated in air and in vacuo were investigated.Polynorbornene had a glass transition temperature of 41.5℃.The polymer began to oxidize in air at a temperature of about 130℃.The quantities of hydroperoxide and calbonyl groups in the polymer increased with oxidation.It was thought that the x-ray diffraction peak at 2θ≈18° corresponds to amorphous halo.This moderately sharp peak suggests that molecules in the polymer are oriented relatively with regularity.It was found that the polynorbornene is a polymer having the double bonds.

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